Abacus Automation is an approved Siemens Solution partners for PLC, HMI, Drives and Cranes. Boasting several award winning projects for innovative solutions to our customers challenges, has led to the development of specialized libraries for GPRS and motion control applications. Libraries that is currently available on the S7-200 range plc's from Siemens. We are also a Registered system integrator for Wonderware. Sole Agents in Africa for Hugo TillQuist. Distributors of Laumas weighing controllers & equipment .